Monitor



FIG. 1 is a perspective view showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a rear right perspective view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines illustrate portions of the monitor that form no part of the claimed design. 

CLAIM The ornamental design for a monitor, as shown. 